SEGMENT INFORMATION (Details) - USD ($) $ in Millions		12 Months Ended
		May 31, 2018	May 31, 2017	May 31, 2016
Segment reporting information [Line Items]
Revenues		$ 39,831	$ 37,728	$ 37,047
Cloud services and license support expenses	[1]	3,612	3,015	2,664
Sales and marketing expenses	[1]	8,431	8,197	7,884
Margin		24,287	23,017	22,410
Total for operating segments [Member]
Segment reporting information [Line Items]
Revenues	[2]	39,878	37,899	37,057
Expenses		15,591	14,882	14,647
Margin	[3]	24,287	23,017	22,410
Total for operating segments [Member] | Cloud and license [Member]
Segment reporting information [Line Items]
Revenues	[2]	32,491	30,389	28,997
Cloud services and license support expenses		3,447	2,885	2,545
Sales and marketing expenses		7,219	6,886	6,570
Margin	[3]	21,825	20,618	19,882
Total for operating segments [Member] | Hardware [Member]
Segment reporting information [Line Items]
Revenues	[2]	3,993	4,152	4,669
Hardware products and support expenses		1,551	1,623	2,031
Sales and marketing expenses		635	820	867
Margin	[3]	1,807	1,709	1,771
Total for operating segments [Member] | Services [Member]
Segment reporting information [Line Items]
Revenues		3,394	3,358	3,391
Services expenses		2,739	2,668	2,634
Margin	[3]	$ 655	$ 690	$ 757

[1] Exclusive of amortization of intangible assets, which is shown separately

[2] Cloud and license revenues and hardware revenues presented for management reporting included revenues related to cloud and license obligations and hardware obligations that would have otherwise been recorded by the acquired businesses as independent entities but were not recognized in our consolidated statements of operations for the periods presented due to business combination accounting requirements. See Note 9 for an explanation of these adjustments and the table below for a reconciliation of our total operating segment revenues to our total revenues as reported in our consolidated statements of operations.

[3] The margins reported reflect only the direct controllable costs of each line of business and do not include allocations of product development, general and administrative and certain other allocable expenses. Additionally, the margins reported above do not reflect amortization of intangible assets, acquisition related and other expenses, restructuring expenses, stock-based compensation, interest expense or certain other non-operating income, net. Refer to the table below for a reconciliation of our total margin for operating segments to our income before provision for income taxes as reported in our consolidated statements of operations.